I work a lot with imaged drives, meaning a do a dd-copy of the drive in question and then work on the image instead of the drive itself.
For most work, I use kpartx to map the drive's partitions to a device under /dev/mapper/. What I'm wondering here is if there's a way to find which of the mapping belong to which image.
root@vyvyan:/tmp# kpartx -a -v Image1 add map loop1p1 (254:4): 0 10240 linear /dev/loop1 2048 add map loop1p2 (254:5): 0 10240 linear /dev/loop1 12288 add map loop1p3 (254:6): 0 52848 linear /dev/loop1 22528 root@vyvyan:/tmp# kpartx -a -v Image2 add map loop2p1 (254:7): 0 33508 linear /dev/loop2 2048 add map loop2p2 (254:8): 0 39820 linear /dev/loop2 35556
Now, let's say I forget which image went to which mapping. Is there a way to let kpartx - or the kernel, or anything else - tell me which image goes where?
EDIT Also, if I accidentally rm the image-file while kpartx has added the mappings, how do you remove the mappings? kpartx wants the actual image to be present.